hackerrank

Weather Observation Station 16 | HackerRank Query the smallest of STATION's Northern Latitudes that is greater than 38.7780, and round to 4 decimal places www.hackerrank.com Problem Query the smallest Northern Latitude (LAT_N) from STATION that is greater than 38.7780 . Round your answer to 4 decimal places. -> 38.7780 보다 큰 lat_n 중에서 가장 작은 값을 소수점 4자리에서 반올림하여 출력하시오. Answer select round(min(lat_n)..

Weather Observation Station 15 | HackerRank Query the Western Longitude for the largest Northern Latitude under 137.2345, rounded to 4 decimal places. www.hackerrank.com Problem Query the Western Longitude (LONG_W) for the largest Northern Latitude (LAT_N) in STATION that is less than 137.2345 . Round your answer to 4 decimal places. -> lat_n이 137.2345보다 작은 값중에서 제일 큰 lat_n을 가진 long_w를 소수점 4자리에서 ..

Weather Observation Station 14 | HackerRank Query the greatest value of the Northern Latitudes from STATION that are under 137.2345 and truncated to 4 decimal places. www.hackerrank.com Problem Query the greatest value of the Northern Latitudes (LAT_N) from STATION that is less than 137.2345 . Truncate your answer to 4 decimal places. -> lat_n이 137.2345 보다 작은 값중에서 제일 큰 값을 소수점 4자리로 출력하시오. Answer ..

Weather Observation Station 13 | HackerRank Query the sum of Northern Latitudes having values greater than 38.7880 and less than 137.2345, truncated to 4 decimal places. www.hackerrank.com Problem Query the sum of Northern Latitudes (LAT_N) from STATION having values greater than 38.7880 and less than 137.2345 . Truncate your answer to 4 decimal places. -> 38.7880보다 크고 137.2345보다 작은 값을 가진 STATIO..

Challenges | HackerRank Print the total number of challenges created by hackers. www.hackerrank.com Problem Julia asked her students to create some coding challenges. Write a query to print the hacker_id, name, and the total number of challenges created by each student. Sort your results by the total number of challenges in descending order. If more than one student created the same number of ch..

Population Census | HackerRank Query the sum of the populations of all cities on the continent 'Asia'. www.hackerrank.com Problem Given the CITY and COUNTRY tables, query the sum of the populations of all cities where the CONTINENT is 'Asia'. -> 아시아에 있는 모든 도시의 인구 수의 합을 출력하시오. Answer select sum(a.population) from city a inner join country b on a.countrycode = b.code where b.continent = "Asia"

Ollivander's Inventory | HackerRank Help pick out Ron's new wand. www.hackerrank.com Problem Harry Potter and his friends are at Ollivander's with Ron, finally replacing Charlie's old broken wand. Hermione decides the best way to choose is by determining the minimum number of gold galleons needed to buy each non-evil wand of high power and age. Write a query to print the id, age, coins_needed, a..

Weather Observation Station 12 | HackerRank Query an alphabetically ordered list of CITY names not starting and ending with vowels. www.hackerrank.com Problem Query the list of CITY names from STATION that do not start with vowels and do not end with vowels. Your result cannot contain duplicates. -> 도시 이름의 시작과 끝이 모음이 포함하지 않는 도시의 이름을 중복 없이 출력하시오. Answer select distinct(city) from station where ci..